Track state of timed doors

[Tunous]

Currently I don't see any place where it's tracked and thus I'm unable to detect if the timed door is currently active or inactive.

This should be added to the Room package where key states are checked as timed doors use the same "hide" and "show" messages.

[Tunous]

Actually never mind. I didn't notice that timed door sits together with rest of keys inside of the Key enum :D